Pressure regulator and tank cover for paint-spraying machines



Jan. 8, 1929.

1,698,247 F. A. TITTEMORE ET AL PRESSURE REGULATOR AND TANK COVER FOR PAINT SPRAYING MACHINES 2 Sheets-Sheet 1 Filed Nov. 7, 1925 f i 7.5 zfgf 2 7 G k'ljNvENTOR v A v BY ek ii fi Jan. 8, 1929. 1,698,247

F. A. TITTEMORE ET AL PRESSURE REGULATOR AND TANK COVER FOR PAINT SPRAYING MACHINES Filed Nov. 1925 2 Sheets-Sheet 2 @lfjVENTOR BY (BM/Jug. 4 752} A oRr'uzY Patented Jan. 8, 1929.

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FRANK A. TITTEMORE AND CHARLES S. RENWICK, OF RICHMOND, CALIFORNIA, AS- SIGNORS '10 HOPKINS SPRAY EQUIPMENT COMPANY, OF SAN FRANCISCO, CALI- FORNIA, A CORPORATION OF NEVADA;

PRESSURE REGULATOR AND TANK COVER FOR PAINT-SPRAYING MACHINES.

Application filed November 7, 1925. Serial No. 67,479.

The present invention relates to improve; ments in paint spraying apparatus and more particularly to a pressure regulating means for the paint containing tank in such pressure paint applying systems.

The invention consists primarily in providing a cover of a paint spraying receptacle with pressure regulating means by which the desired pressure may be maintained on the contents of the receptacle to discharge the same therefrom as desired; to provide a means whereby the pressure may be admitted into the receptacle to agitate the contents thereof and to provide a receptacle with means whereby a container as, for example, in the form of a bucket, may be positioned within the main receptacle, and its contents ejected through a separate outlet by the same regulated pressure which acts on the main body of material, thereby ada ting the apparatus for two color work.

The lnvention consists primarily in a diaphragm pressure actuated valve adapted to control an air supply into the receptacle and the operation of the diaphragm by pressure being controlled by the adjustment of tension means.

With the above mentioned and other objects in view, the invention consists in the novel construction and combination of parts hereinafter described, illustrated in the ac,- companying drawings and pointed out in the claims hereto a pended, it being understood that various 0 anges in the form, pro portion, size and minor details of construction within the scope of the claims may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention. 1

In the drawings Fig. 1 illustrates a view in side elevation of the preferred embodiment of our invention, connected with an air pressure means and a spray nozzle.

Fig. 2 is an enlarged transverse sectional view of the cover portion of the paint spray tank.

Fig. 3 is a view in plan of the underside of the cover for the tank.

Fig. 4 is a detail sectional view on line 4-4 of Fig. 3.

Fig. 5 is a detail view in cross section of the front valve 36.

-. its end to one end of a through bore 7 in a The mechanism above is of" tank cover 8. the type set forth in our issued United States Letters Patent Nos. 1,347,790 and 1,435,761.

The cover 8 is adapted to close the open top of a conventional tank 9 provided with a paint outlet 10 at its base controlled by a valve 11, and from the outlet leads a flexible tube 12 for conveying paint to any well known type of spray gun 13. supplied with air under pressure through a tubular connection 14 extending from the opposite end of the bore 7 to that with which pipe 6 is connected.

The cover 8 rests on a gasket 15 and is held in position by a suitable clamp mechan1sm 16. It is provided centrally with an opening 17 and with a lateral extension 18 The gun is connecting with the bore 7 approximately midway of its length. The extension terminates III a downwardly disposed nozzle 19 arranged centrally of the o ening 17. The lower end of the opening 1 is closed by a sealing member 20 threaded thereinto, the same being provided, with a central bore in which reeiprocates a valve ring 21 having a scalloped periphery 22, and the center of which is closed by a plug 23 mounting a valve gasket 24 for contacting with the end of the nozzle 19 to close the same.

A coiled spring 25 tends to normally maintain the packing 24 seated against the outlet in the nozzle 19, said packing being carried by a collar against which the spring 25 bears. The lower end of the central opening in the member 20 carries a tubular threaded plug 27, the opening in which is normally closed by a spring seated check valve 28.

Upwardly from the ring 21 extends a stirrup 29 connected with a diaphragm 30 extending across and closing the 11 per open end of the opening 17 The diap ragm 30 is maintained in position by a cap 31 threaded "to the walls surrounding the opening, and said cap at its upper end carries a winged screw member 32 bearing on the coiled spring 33 interposed between the lower end of the screw 32 and the plate 34 on the up or side of the diaphragm 30.

member. 24 from the end of the nozzle and will accumulate within the tank until such time as the air pressure acting on the under side of the diaphragm 3O overbalancesthe tension of spring 33 and causes the action of the diaphragm and stirru to seal the member 24 against the end of t e nozzle and preclude further pressure until such time as the pressure in the tank is relieved.

A gauge 35 connected with the opening 17 indicates the pressure within the opening and tank.

Within the cover is rotatably mounted a plu valve 36 intersecting the lateral extension 18, and this valve is provided with a T bore 37 Fig. 5, which admitsof the valve positioned topermit air 'to enter'the being ough the by-pass 38 with which is tank t connected a pipe'39 extendin to a point near the base'of the tank, an n in this case the entering air maintains the paint in agitation. 1

.The valve 36 is also provided with an inclined bore 39 which is adapted to connect the relief passage 40 with the atmosphere on the pro er positioning of the valve.

To enab e the application of two color work by air pressure from a single tank, a discharge tube 40 is extended through the tank, its outlet beinjontrolled by a valve 41, and over the en 'jiigfthe pipe is adapted to be positioned a separate container containing the paint or material of a color dii-' ferent from that within the main tank 9, the interior of this latter container being e5;- posed to the air pressure within thetank.

The container cover is a one piece combination head and ressure regulating device e nipped with ut onevalve cock that is so esigned that it can control'theoutside pressure into tlr 'e diaphragm chamber or release the air'corftained in the tank into the atmosphere or pass air into the agitator pipe for agitation purposes in container, or control air from'entering or exhaustin from channels that effect air pressure re erred to above. 7

We claimstank havin a 1. In combination with a fluid containing tank, a removable cover therefor, a receptacle within'the tank and containing fluid ir entering the lateral extension 18' will eject through the nozzle 19 and unseat the and into the receptacle, said receptacle being separate from that in the tank, means for de ivering air under pressure into the tank atall times 0 en to the air pressure within the tank, fluid outlets for both the tank and receptacle and me'ans-for'regulating the air admitted to the tank to maintain the pressure therein substantially constant.

2. In combination with a fluid containing tank havin cover for t e tank having a main passage a fluid outlet, of a removable therein adapted to receive an air supplyconnection at one end and ada ted to receive an outlet connection at the ot er and having a branch passage leading from said main passage and opening into said tank, an automatlc valve within the container for controlling the branch passage at the point of dischar e into the container, said valve being an er the influence of pressure within the container for the purpose of maintaining a substantially constant air pressure within the container, a single valve in said branch passage for releasing the pressure within the tank when in one osition and a pi e for delivering air below' t e surface of the iquid 1n the tank to agitate it when said single valve is in its other position.

- 3. In combination with a fluid containing fluid outlet, a removable cover forthe ta the same being provided with a divided channel opening into the container and into the atmosphere, and one end adapted for connection with an air supply under pressure, a pressure regulating valve within the channel opening into the container for precluding the admission of air.

into the tank on the air therein attaining a predetermined pressure, and a manually controlled valve within the channel opening into the tank for positioning to provide a a pressure release orifice from the interior of the tank to the atmosphere and for positioning to afford an air inlet into the tank from said channel in advance of said pressure regulating valve.

In testimony whereof we have signed our names to this specification.

F RAN K A, TIT-TEMORE. CHARLES S. Z'RENWICK. 

